EP0210111B1 - Superstructure de cuve d'électrolyse avec portique intermédiaire, pour la production d'aluminium - Google Patents
Superstructure de cuve d'électrolyse avec portique intermédiaire, pour la production d'aluminium Download PDFInfo
- Publication number
- EP0210111B1 EP0210111B1 EP86420140A EP86420140A EP0210111B1 EP 0210111 B1 EP0210111 B1 EP 0210111B1 EP 86420140 A EP86420140 A EP 86420140A EP 86420140 A EP86420140 A EP 86420140A EP 0210111 B1 EP0210111 B1 EP 0210111B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gantry
- tank
- legs
- tank according
- supported
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/10—External supporting frames or structures
Definitions
- the present invention relates to a device of the gantry type, intended to support in its middle, or at one or more intermediate points, the superstructure of a Hall-Héroult electrolysis tank for the production of aluminum.
- the superstructure of a modern electrolysis tank is made up of one or more horizontal steel beams supported on feet at their ends and supporting on the one hand the anodic current ascents and the anodic frame, formed by bars of aluminum from which the anodes are supplied, and on the other hand the alumina supply systems (alumina tank, crust breaker, metering distributor), the anode up-down control systems, and very often , the effluent, gas and dust collection pipes emitted by the tank.
- alumina supply systems alumina tank, crust breaker, metering distributor
- the feet are supported at the ends of the metal box which constitutes the actual electrolysis tank.
- This arrangement has the advantage of freeing up space on the two large sides of the tanks, through which the anodes are changed, and of not transmitting to the superstructure the transverse thermal expansions which appear in the current part of the box. after starting the tank, during start-up.
- the current trend is to constantly increase the unit power of the tanks, which results in an elongation of the box, the length of which can now be between 15 and 20 meters for tanks operating under 250 KA and beyond.
- the construction of the superstructure poses a difficult problem: the process of regulating the tanks indeed requires extremely precise positioning of the anode plane with respect to the cathode plane formed by the sheet of liquid aluminim which remains perfectly horizontal (except weak local deviations from magnetic effects).
- the invention aims to solve the problem of the rigidity of the superstructure of modern high-power tanks, for the production of aluminum by the Hall-Héroult process, working at intensities ranging from more than 200,000 to 500 000 amperes and even beyond, without interfering with the normal operation of the tanks which includes, in particular, the periodic changes of spent anodes.
- a tank for the production of aluminum according to the Hall-Héroult process by electrolysis of alumina in molten cryolite the tank being constituted by a rigid metal box, internally lined with heat insulation and provided with a carbon cathode, elongated parallelepiped shape, the two ends of which are called heads, and by a superstructure constituted by at least one rigid beam arranged along the long length of the box, in particular supporting the anode frame supplied with current by positive rises, and on which the anodes, this beam resting, at its ends, on supports arranged at the two heads of the tank, this superstructure being characterized in that each rigid beam rests on at least one intermediate gantry.
- the support leg (s) of this gantry are preferably placed in line with conductors bringing the current coming from the previous tank, and the supports include means for expanding independently of the box.
- the beam can be, in its length, constituted by a single element, or by several distinct elements.
- Figure 1 recalls the structure, in cross section of a modern electrolysis tank, PECHINEY type.
- Figures 2 to 5 relate to the invention; to respect the proportions (width / length of the box), part of the length of the superstructures has been truncated in these 2 figures. Furthermore, the fixing devices have not been shown anodes, and the height adjustment devices of the anode assemblies, which are not part of the invention and are well known to those skilled in the art.
- the essential organs of the electrolysis cell have been underlined the metal box (1), the internal lining (2), the cathode (3) and the cathode bar (4), the sheet of liquid AI ( 5), the molten cryolith bath (6) covered with a solidified crust (7), the anodes (8) suspended by the rods (9) and fixed to the anode frame (10) and the superstructure formed by the two rigid beams (11), which support, in particular, the anode frame (10), the set of anodes (8), as well as the alumina metering distributor (12), whose local storage silo (13) is often placed between the two beams (11), as well as the effluent collection pipes not shown.
- FIG 2 which shows an example of a superstructure according to the invention
- the outline of the upper rim (15) of the box (1) is shown diagrammatically.
- the rigid beams (11) which form the superstructure are separated into two parts (11A) and (11B), the outer ends of which rest on the feet (16A) and (16B), arranged at each head of the tank and the central ends. are based on the gantry (17).
- this gantry itself comprises 4 feet (18) which are supported on the upper edge (15) of the box in its central part.
- This support system must take account of the fact that the box expands during service, in particular in the transverse direction, and it therefore does not really constitute a fixed support point. It is therefore necessary to provide for a freedom of movement of this support in the direction of expansion of the box, that is to say in the general direction of the current flowing through the line of tanks arranged transversely relative to the axis of the line, for example by means of roller bearings suitably protected against abrasive alumina dust and other constituents of the electrolyte.
- the superstructure is divided into two independent parts (11 A) (11B), arranged on either side of the intermediate gantry, there are no longer any bending stresses at the gantry; in addition, the manufacture, transport and installation of the two elements are simplified, thanks to the reduction in length and weight.
- the support of the ends of the beams (11A) and (11B) on the intermediate gantry (17) is preferably done by a means making it possible to absorb the slight relative movements of the supports of the beams on the gantry.
- a simple solution consists in letting the central ends of the beams (11A) and (11B) rest freely on the upper part (19) of the gantry (17).
- the anode frame (10) is preferably also made up of two parts, so as to distribute the expansions on either side of the center of the superstructure. There is then between the two parts of said frame an expansion joint ensuring electrical contact, for example a loop of aluminum strips, or any other equivalent means.
- the solution of the central gantry (17) with four legs offers the advantage of making it a stable element in itself, which can thus be used as a support and connection member for a superstructure in two independent sections, and even serve supporting the motorization assemblies of the up-down movements of the anodes; the central position favoring the distribution of the forces on the two half-frames supported by the two half-beams.
- the support of the feet (18) of the gantry can be carried out, as said above, on the upper edge (15) of the box, but also outside, on specialized elements, for example a solid or reinforced concrete pillars.
- This arrangement - which overcomes the problems of transverse expansion of the box - however requires to increase the space between the tanks, therefore to lengthen or widen the building, which affects the cost price.
- FIG. 3 Another embodiment of the invention (fig. 3) consists in supporting each half-section of the beams (11A) (11B) by two independent gantries (20) with two feet (23A) (23B), one for the ends (24A) of (11A) and one for the ends (24B) of (11B). In this case, and to ensure stability, each gantry (20A, 20B) must be welded respectively to the beams (11A) (11B), at the supports (21A, 21 B).
- FIG. 4 another alternative embodiment of the invention has been shown, in which the intermediate gantry has a shape reminiscent of that of a capital A (25), the support of the beam (11) is making on the horizontal bar (26) of A.
- a particularly advantageous embodiment consists in using, as gantry, two elements in A, braced, so as to form a rigid gantry, the two elements being spaced apart by a distance such that the one can accommodate, between them, a current rise (29) which is connected to the frame (10).
- the positioning of the gantry at at least one of the current rises (29) coming from the previous tank is, moreover, entirely compatible with the two and four foot gantry structures of FIGS. 2 and 3.
- FIG. 5 represents another form of implementation of the invention, particularly simplified, since it is reduced to a horizontal support beam (27) resting on two feet (28) - (the second is not visible in the figure).
- the horizontal support beam (27) is shown in tubular, square form, but it can also be formed by any conventional profile, for example in 1, the dimensions of which are based on well known calculations of resistance of materials.
- the climbs (29) in line with the intermediate support (27) (28), that is to say substantially in the same vertical plane as this support, the flexible foils (30) which provide the electrical connection between the rise (29) and the anode frame (10) being connected to this frame (10) in the hatched area (31), so as to free up the maximum space for anode change operations such as (8) or (8A) worn.
- the rigid beams (11) are divided into two parts and rest on a central gantry, it is obvious, for the person skilled in the art, that it also applies to the case where, for a larger tank, the rigid beams (11) are divided into more than two parts, for example three parts, equal or not, supported by two intermediate gantries two or four feet .
- These tank superstructures can therefore be made in a modular fashion, so that their maximum length is no longer limited by the weight of the beams and the transport and installation difficulties, which added to the bending problems.
- the invention makes it possible to take account of the effects of deflection of the beam, due to differential thermal expansions.
- the horizontal support beam such as (26) or (27) of the gantry is subjected to temperature variations which are a function of the alumina covering of the crust. The highest temperature will be reached during a change of anode near this beam, this change causing a rupture of the solidified electrolyte crust, and direct radiation of the electrolysis, at about 930 - 960 °, on the superstructure.
- the invention in the various modes of implementation which have been described, removes one of the most serious obstacles to the production of tanks at 500,000 amperes (and even beyond), whose technical and economic advantages are very attractive.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
- Prevention Of Electric Corrosion (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Hybrid Cells (AREA)
- Road Paving Structures (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Revetment (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86420140T ATE44555T1 (de) | 1985-05-30 | 1986-05-27 | Ueberbau mit zwischenportal fuer eine elektrolysenwanne zur herstellung von aluminium. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8508578A FR2582677B1 (fr) | 1985-05-30 | 1985-05-30 | Superstructure de cuve d'electrolyse avec portique intermediaire, pour la production d'aluminium |
FR8508578 | 1985-05-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0210111A1 EP0210111A1 (fr) | 1987-01-28 |
EP0210111B1 true EP0210111B1 (fr) | 1989-07-12 |
Family
ID=9319951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86420140A Expired EP0210111B1 (fr) | 1985-05-30 | 1986-05-27 | Superstructure de cuve d'électrolyse avec portique intermédiaire, pour la production d'aluminium |
Country Status (19)
Country | Link |
---|---|
US (1) | US4720333A (pt) |
EP (1) | EP0210111B1 (pt) |
JP (1) | JPS6289889A (pt) |
CN (1) | CN1007360B (pt) |
AT (1) | ATE44555T1 (pt) |
AU (1) | AU576469B2 (pt) |
BR (1) | BR8602470A (pt) |
DE (1) | DE3664342D1 (pt) |
ES (1) | ES8705051A1 (pt) |
FR (1) | FR2582677B1 (pt) |
GR (1) | GR861372B (pt) |
HU (1) | HU198532B (pt) |
IN (1) | IN166372B (pt) |
IS (1) | IS1372B6 (pt) |
NO (1) | NO862132L (pt) |
NZ (1) | NZ216335A (pt) |
OA (1) | OA08332A (pt) |
YU (1) | YU91086A (pt) |
ZA (1) | ZA864014B (pt) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2694945B1 (fr) * | 1992-08-20 | 1994-10-07 | Pechiney Aluminium | Superstructure de cuve d'électrolyse de très haute intensité pour la production d'aluminium. |
US5538607A (en) * | 1995-04-12 | 1996-07-23 | Pate; Ray H. | Anode assembly comprising an anode bar for the production of molten metal by electrolysis |
US5938914A (en) * | 1997-09-19 | 1999-08-17 | Aluminum Company Of America | Molten salt bath circulation design for an electrolytic cell |
FR2842215B1 (fr) * | 2002-07-09 | 2004-08-13 | Pechiney Aluminium | Procede et systeme de refroidissement d'une cuve d'electrolyse pour la production d'aluminium |
AU2006227546B2 (en) * | 2005-03-24 | 2010-06-03 | Bhp Billiton Innovation Pty Ltd | Anode support apparatus |
AP2007004106A0 (en) * | 2005-03-24 | 2007-08-31 | Bhp Billitton Innovation Pty L | Anode support apparatus |
CN102086524B (zh) * | 2009-12-04 | 2013-12-25 | 贵阳铝镁设计研究院有限公司 | 自平衡应力的电解槽摇篮架 |
CN103132102B (zh) * | 2011-11-25 | 2016-05-11 | 贵阳铝镁设计研究院有限公司 | 铝电解槽槽壳用防拱变形的可拆式中间支承装置 |
CA2919544C (fr) * | 2013-08-09 | 2021-11-16 | Rio Tinto Alcan International Limited | Cuve d'electrolyse destinee a la production d'aluminium et usine d'electrolyse comprenant cette cuve |
CA2968421C (en) * | 2014-11-21 | 2018-07-03 | Hatch Ltd. | Low-profile aluminum cell potshell and method for increasing the production capacity of an aluminum cell potline |
CN104911632B (zh) * | 2015-05-26 | 2017-10-10 | 东北大学设计研究院(有限公司) | 一种可拆装的分体式铝电解槽上部结构 |
GB2543788A (en) * | 2015-10-28 | 2017-05-03 | Dubai Aluminium Pjsc | Superstructure for electrolytic cell, comprising means of moving anode beam with respect to the frame of this superstructure |
EP3875635A1 (en) * | 2016-03-25 | 2021-09-08 | Elysis Limited Partnership | Electrode configurations for electrolytic cells and related methods |
CN105862079B (zh) * | 2016-06-10 | 2017-12-22 | 河南永登铝业有限公司阳城分公司 | 铝电解槽上部结构在线顶升抬高机构及工艺 |
GB2571274A (en) * | 2018-02-21 | 2019-08-28 | Dubai Aluminium Pjsc | Electrolytic cell with a superstructure having intermediate legs, suitable for the Hall-Heroult process |
FR3093737B1 (fr) * | 2019-03-14 | 2023-02-24 | Rio Tinto Alcan Int Ltd | Dispositif de manutention destiné à convoyer un outil d’intervention sur une cuve d’électrolyse. |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR435561A (fr) * | 1911-10-23 | 1912-03-05 | Ludovic Courties | Système de transporteur aérien utilisable pour le transport à terre des déblais et matériaux extraits par une drague fluviale |
US2958635A (en) * | 1957-12-24 | 1960-11-01 | Oronzio De Nora Impianti | Electrolytic cell cover |
DE1163558B (de) * | 1960-12-23 | 1964-02-20 | Aluminium Ind Ag | Elektrolysezelle zur Herstellung von Aluminium |
US3126326A (en) * | 1961-06-27 | 1964-03-24 | Method and apparatus for baking | |
FR1440005A (fr) * | 1965-04-09 | 1966-05-27 | Pechiney Prod Chimiques Sa | Procédé pour la réalisation d'une superstructure pour cuve d'électrolyse ignée et superstructures réalisées selon ce procédé |
US3607685A (en) * | 1968-08-21 | 1971-09-21 | Arthur F Johnson | Aluminum reduction cell and system for energy conservation therein |
DE2263348A1 (de) * | 1972-12-23 | 1974-07-04 | Siemag Translift Gmbh | Anlage zur zerlegung des aluminiumoxyds in der schmelzflusselektrolyse |
US4222841A (en) * | 1979-04-23 | 1980-09-16 | Alumax Inc. | Hall cell |
IN158317B (pt) * | 1981-12-08 | 1986-10-18 | Pechiney Aluminium | |
US4608134A (en) * | 1985-04-22 | 1986-08-26 | Aluminum Company Of America | Hall cell with inert liner |
US4608135A (en) * | 1985-04-22 | 1986-08-26 | Aluminum Company Of America | Hall cell |
-
1985
- 1985-05-30 FR FR8508578A patent/FR2582677B1/fr not_active Expired - Fee Related
-
1986
- 1986-04-30 IN IN339/CAL/86A patent/IN166372B/en unknown
- 1986-05-27 EP EP86420140A patent/EP0210111B1/fr not_active Expired
- 1986-05-27 AT AT86420140T patent/ATE44555T1/de not_active IP Right Cessation
- 1986-05-27 DE DE8686420140T patent/DE3664342D1/de not_active Expired
- 1986-05-28 GR GR861372A patent/GR861372B/el unknown
- 1986-05-28 YU YU00910/86A patent/YU91086A/xx unknown
- 1986-05-28 IS IS3102A patent/IS1372B6/is unknown
- 1986-05-28 NZ NZ216335A patent/NZ216335A/en unknown
- 1986-05-29 AU AU58055/86A patent/AU576469B2/en not_active Ceased
- 1986-05-29 JP JP61124613A patent/JPS6289889A/ja active Pending
- 1986-05-29 ZA ZA864014A patent/ZA864014B/xx unknown
- 1986-05-29 US US06/868,145 patent/US4720333A/en not_active Expired - Fee Related
- 1986-05-29 BR BR8602470A patent/BR8602470A/pt unknown
- 1986-05-29 HU HU862272A patent/HU198532B/hu not_active IP Right Cessation
- 1986-05-29 NO NO862132A patent/NO862132L/no unknown
- 1986-05-29 OA OA58866A patent/OA08332A/xx unknown
- 1986-05-29 CN CN86103590A patent/CN1007360B/zh not_active Expired
- 1986-05-29 ES ES555444A patent/ES8705051A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IS3102A7 (is) | 1986-12-01 |
AU576469B2 (en) | 1988-08-25 |
YU91086A (en) | 1987-12-31 |
NZ216335A (en) | 1990-01-29 |
ES8705051A1 (es) | 1987-04-16 |
ES555444A0 (es) | 1987-04-16 |
HUT44632A (en) | 1988-03-28 |
OA08332A (fr) | 1988-02-29 |
FR2582677B1 (fr) | 1990-08-17 |
IN166372B (pt) | 1990-04-21 |
GR861372B (en) | 1986-08-27 |
FR2582677A1 (fr) | 1986-12-05 |
HU198532B (en) | 1989-10-30 |
ZA864014B (en) | 1987-01-28 |
CN86103590A (zh) | 1987-01-28 |
BR8602470A (pt) | 1987-01-27 |
NO862132L (no) | 1986-12-01 |
CN1007360B (zh) | 1990-03-28 |
AU5805586A (en) | 1986-12-04 |
US4720333A (en) | 1988-01-19 |
ATE44555T1 (de) | 1989-07-15 |
JPS6289889A (ja) | 1987-04-24 |
IS1372B6 (is) | 1989-06-30 |
EP0210111A1 (fr) | 1987-01-28 |
DE3664342D1 (en) | 1989-08-17 |
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